The WordPress Feed API provides functionality for both generating outgoing feeds (RSS, Atom, RDF) and consuming external feeds via SimplePie integration. Feed Types WordPress supports multiple feed formats out of...
Feed Consumption fetch_feed() Builds a SimplePie object from an RSS or Atom feed URL. function fetch_feed( string|array $url ): SimplePieSimplePie|WP_Error Parameters: $url - URL of feed to retrieve, or array...
Filters Content Filters the_title_rss Filters the post title for use in feeds. apply_filters( 'the_title_rss', string $title ): string Parameters: $title - The current post title Example: add_filter( 'the_title_rss', function( $title...
Represents a collection of fonts that can be installed from the Font Library. Since: 6.5.0 Source: wp-includes/fonts/class-wp-font-collection.php Description A font collection is a group of font families that users can...
Extracts font definitions from theme.json and style variations. Since: 6.4.0 Source: wp-includes/fonts/class-wp-font-face-resolver.php Access: Private (internal core usage) Description This class abstracts the processing of different data sources (such as theme.json)...
Generates and prints @font-face CSS styles for given fonts. Since: 6.4.0 Source: wp-includes/fonts/class-wp-font-face.php Description This class handles the generation of CSS @font-face rules from font definitions. It validates font properties,...
Singleton registry for font collections. Since: 6.5.0 Source: wp-includes/fonts/class-wp-font-library.php Description The Font Library manages the registration and retrieval of font collections. It follows the singleton pattern to ensure a single...
Core base Exception class for WordPress. Source: wp-includes/class-wp-exception.php Since: 6.7.0 Description WP_Exception is the base exception class for WordPress. All future WordPress-specific exceptions should extend this class. This provides a...
Default shutdown handler for fatal PHP errors. Source: wp-includes/class-wp-fatal-error-handler.php Since: 5.2.0 Description WP_Fatal_Error_Handler handles fatal PHP errors that would normally cause a "white screen of death" (WSOD). It provides user-friendly...
WordPress error handling system using the WP_Error class pattern and PHP error/exception handling. Since: 2.1.0 (WP_Error), 5.2.0 (Fatal Error Handler), 6.7.0 (WP_Exception) Source: wp-includes/class-wp-error.php, wp-includes/class-wp-exception.php, wp-includes/class-wp-fatal-error-handler.php, wp-includes/error-protection.php Components Component Description...